SMB over RN528X not working

Thanks StephenB. Looking at the link you provided earlier, it's mainly about putting commands in a directory that stays persistent. Regarding the actual SMB Multichannel commands required, still searching. QNAP only requires a single change to their SMB.conf file, but appears Netgear's folder structure is completely different, even though it's also using Samba. More research required.

Re: RN212, yes it is connected directly to XS716E switch, same as RN528, RN314 and PC. All are connected directly to switch with 3' Cat7 cable pairs, total of 8 ports. All are working, each assigned its own IP address (unless/until a pair gets bonded of course). 

Ran another puzzling test this morning: re-enabled bonding on RN528X (dual-10GbE), with RoundRobin and MTU=9014. Unbelievably, and unlike the RN212 and RN314, ATTO (and file transfer) speeds dropped to 573MB/s read, 250MB/s write - barely over half of what I was getting without bonding. Rebooted both the NAS and PC after first runs because I couldn't believe it. Same result after reboots. Again, config is PC w/ 2 independent 10GbE ETH ports (each assigned its own IP address over DHCP, no bonding), the XS716E 10GbE switch with no LAGs configured, and the RN528X as described above w/ bonding. The RN212/314 units have 1GbE, I'm thinking that bonding these is somehow OK for the PC but bonding to 10GbE ports on the RN528X is not OK for the PC. But I don't (yet) understand why. Since I've transferred at 10Gbps over each of the PC ETH ports previously, I know the X550-T2 NIC is OK. It just doesn't like to see a bonded pair of 10GbE ports on the NAS. Maybe it's a combo of the switch/PC/NAS, will experiment.